CVE-2013-0914 Information

Description

The flush_signal_handlers function in kernel/signal.c in the Linux kernel before 3.8.4 preserves the value of the sa_restorer field across an exec operation which makes it easier for local users to bypass the ASLR protection mechanism via a crafted application containing a sigaction system call.

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2ca39528c01a933f6689cd6505ce65bd6d68a530 http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html http://lists.opensuse.org/opensuse-updates/2013-12/msg00129.html http://rhn.redhat.com/errata/RHSA-2013-1051.html http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.8.4 http://www.mandriva.com/security/advisories?name=MDVSA-2013:176 http://www.openwall.com/lists/oss-security/2013/03/11/8 http://www.ubuntu.com/usn/USN-1787-1 http://www.ubuntu.com/usn/USN-1788-1 http://www.ubuntu.com/usn/USN-1792-1 http://www.ubuntu.com/usn/USN-1793-1 http://www.ubuntu.com/usn/USN-1794-1 http://www.ubuntu.com/usn/USN-1795-1 http://www.ubuntu.com/usn/USN-1796-1 http://www.ubuntu.com/usn/USN-1797-1 http://www.ubuntu.com/usn/USN-1798-1 https://bugzilla.redhat.com/show_bug.cgi?id=920499 https://github.com/torvalds/linux/commit/2ca39528c01a933f6689cd6505ce65bd6d68a530